diff --git a/Makefile.DJ b/Makefile.DJ
index d269fcdbb0e..78ebf43efb9 100644
--- a/Makefile.DJ
+++ b/Makefile.DJ
@@ -31,8 +31,6 @@
 #  Available options:
 #
 #    Environment variables:
-#	CPU		optimize for the given processor.
-#			default = pentium
 #	GLU=[mesa|sgi]	specify GLU directory; can be `sgi' (requires GNU/C++)
 #			or `mesa'.
 #			default = mesa
@@ -59,12 +57,10 @@
 
 .PHONY : all libgl libglu libglut clean realclean
 
-CPU ?= pentium
-
 GLU ?= mesa
 
 CFLAGS = -Wall -W -pedantic
-CFLAGS += -O2 -ffast-math -mtune=$(CPU)
+CFLAGS += -O2 -ffast-math
 
 export CFLAGS
 
diff --git a/Makefile.mgw b/Makefile.mgw
index d544b09398c..70c264a8d86 100644
--- a/Makefile.mgw
+++ b/Makefile.mgw
@@ -31,8 +31,6 @@
 #  Available options:
 #
 #    Environment variables:
-#	CPU		optimize for the given processor.
-#			default = pentium
 #	GLIDE		path to Glide3 SDK; used with FX.
 #			default = $(TOP)/glide3
 #	FX=1		build for 3dfx Glide3. Note that this disables
@@ -57,8 +55,6 @@
 
 .PHONY : all libgl clean realclean
 
-CPU ?= pentium
-
 ifeq ($(ICD),1)
   # when -std=c99 mingw will not define WIN32
   CFLAGS = -Wall -W -Werror
@@ -66,7 +62,7 @@ else
   # I love c89
   CFLAGS = -Wall -W -pedantic
 endif
-CFLAGS += -O2 -ffast-math -mtune=$(CPU)
+CFLAGS += -O2 -ffast-math
 
 export CFLAGS
 
diff --git a/progs/samples/Makefile.DJ b/progs/samples/Makefile.DJ
index 557695a66cb..cda4e059418 100644
--- a/progs/samples/Makefile.DJ
+++ b/progs/samples/Makefile.DJ
@@ -31,8 +31,6 @@
 #  Available options:
 #
 #    Environment variables:
-#	CPU		optimize for the given processor.
-#			default = pentium
 #	GLIDE		path to Glide3 SDK; used with FX.
 #			default = $(TOP)/glide3
 #	FX=1		build for 3dfx Glide3. Note that this disables
@@ -54,12 +52,11 @@
 .SECONDARY: ../util/readtex.o ../util/showbuffer.o
 
 TOP = ../..
-CPU ?= pentium
 GLIDE ?= $(TOP)/glide3
 
 CC = gcc
 CFLAGS = -Wall -W -pedantic
-CFLAGS += -O2 -ffast-math -mtune=$(CPU)
+CFLAGS += -O2 -ffast-math
 CFLAGS += -I$(TOP)/include -I../util
 CFLAGS += -DGLUT_IMPORT_LIB
 ifeq ($(FX),1)
diff --git a/progs/samples/Makefile.mgw b/progs/samples/Makefile.mgw
index 54dbfb706ad..11935405783 100644
--- a/progs/samples/Makefile.mgw
+++ b/progs/samples/Makefile.mgw
@@ -31,8 +31,6 @@
 #  Available options:
 #
 #    Environment variables:
-#	CPU		optimize for the given processor.
-#			default = pentium
 #
 #    Targets:
 #	<file.exe>	build a specific file
@@ -45,11 +43,10 @@
 .SECONDARY: ../util/readtex.o ../util/showbuffer.o
 
 TOP = ../..
-CPU ?= pentium
 
 CC = mingw32-gcc
 CFLAGS = -Wall -W -pedantic
-CFLAGS += -O2 -ffast-math -mtune=$(CPU)
+CFLAGS += -O2 -ffast-math
 CFLAGS += -I$(TOP)/include -I../util
 ifeq ($(FX),1)
 CFLAGS += -DFX